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WO2021197160A1 - Procédé de communication et dispositif de communication - Google Patents

Procédé de communication et dispositif de communication Download PDF

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Publication number
WO2021197160A1
WO2021197160A1 PCT/CN2021/082694 CN2021082694W WO2021197160A1 WO 2021197160 A1 WO2021197160 A1 WO 2021197160A1 CN 2021082694 W CN2021082694 W CN 2021082694W WO 2021197160 A1 WO2021197160 A1 WO 2021197160A1
Authority
WO
WIPO (PCT)
Prior art keywords
access network
network device
capability information
communication
service type
Prior art date
Application number
PCT/CN2021/082694
Other languages
English (en)
Chinese (zh)
Inventor
强鹂
谭佳瑶
张向东
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2021197160A1 publication Critical patent/WO2021197160A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H04W36/008355—Determination of target cell based on user equipment [UE] properties, e.g. UE service capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • This application relates to the field of communication, and in particular to a communication method and communication device.
  • the access network device (that is, the source access network device) to which the terminal device is connecting selects the target access network device for the terminal device. If there is no directly connected interface between the source access network device and the target access network device, such as X2 interface or Xn interface, you can use the interface between the access network device and the core network, such as S1 interface or N2 interface, to switch .
  • the specific process is: the source access network device selects the target access network device according to the signal strength of other access network devices, and sends a handover request to the target access network device through the core network, and then receives it from the target access network device through the core network Switch response.
  • the source access network device may send the configuration information of the wireless resource included in the handover response to the terminal device, so that the terminal device can access the target access network device. That is to say, the foregoing handover procedure involves complex signaling interaction between the access network device and the core network, and the signaling overhead is relatively large.
  • the target access network equipment selected only based on signal strength may not support the service of the terminal equipment, that is, the target access network equipment selection is unreasonable .
  • the success rate of the above handover process is low, which results in the need to perform the above handover process multiple times to successfully handover, wastes a lot of signaling resources, low handover efficiency, and even executes the above handover process multiple times may fail the handover, eventually leading to the terminal The communication of the device is interrupted.
  • the embodiments of the present application provide a communication method and a communication device, which can improve the accuracy of target base station selection and improve handover efficiency.
  • a communication method includes: receiving a first handover request from a source access network device, determining first capability information, and determining whether at least one first candidate access network device can provide a service for the terminal device according to the first capability information.
  • the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device, and the first capability information is used to indicate the service capability of the at least one first candidate access network device.
  • the first network element receives a first handover request from a source access network device, and the first handover request includes an identifier of at least one first candidate access network device And the service type information of the terminal device, and then determine the first capability information used to indicate the service capability of the at least one first candidate access network device, and the first network element determines the at least one first candidate access network device according to the first capability information Whether the networked device can provide services for the terminal device, or if the terminal device cannot provide the service, the first network element sends a handover response indicating that the terminal device cannot be provided with the service to the source access network device.
  • the first network element determines whether the first candidate access network device can be a legal target access network device, which can reduce the complicated signaling interaction between the first network element and the first candidate access network device, and save A large amount of signaling resources, and the first network element considers the capability information of the first candidate access network device in the judgment process, which can improve the handover success rate and reliability, thereby improving the handover efficiency.
  • the service type of the terminal device may include one or more of the following: reduced capacity (REDCAP), multicast broadcast service (MBS), vehicle-to-everything (V2X) ), non-public network (NPN).
  • REDCAP reduced capacity
  • MBS multicast broadcast service
  • V2X vehicle-to-everything
  • NPN non-public network
  • the first capability information comes from the second network element. That is, the first network element can determine whether it has the first capability information, and if there is no or lack of the first capability information of some of the first candidate access network devices, it can interact with the second network element to obtain the first capability. information.
  • the communication method described in the first aspect may further include: receiving second capability information from a second network element.
  • the second capability information is used to determine at least one second candidate access network device. That is, the first network element may also interact with the second network element to obtain second capability information, so as to provide at least one second candidate access network device for the source access network device.
  • the communication method described in the first aspect may further include: sending a handover response to the source access network device.
  • the handover response includes the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the first network element determines that the target access network device selection is unreasonable, it can provide the source access network device with a suggested list of target access network devices, that is, at least one second candidate access network device for the source
  • the access network device reselects the target access network device, thereby further improving the handover efficiency.
  • a communication method includes: sending a first handover request to a first network element, and receiving a handover response from the first network element.
  • the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device, and the handover response is used to indicate that the at least one first candidate access network device cannot provide service for the terminal device.
  • the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-connected everything, and non-public network.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device. That is, the source access network device can receive at least one second candidate access network device that is recommended by the first network element and supports the service of the terminal device.
  • the communication method described in the second aspect may further include: determining the target access network device according to the identifier of the at least one second candidate access network device. In this way, the source access network device can select the target access network device from the at least one second candidate access network device suggested by the first network element, which can improve the success rate of handover of the terminal device.
  • the communication method described in the second aspect may further include: sending a second handover request to the first network element.
  • the second handover request includes the identifier of the target access network device.
  • the source access network device may also send a second handover request to the first network element, and the target access network device is at least one second candidate from the service corresponding to the service type of the terminal device. The one selected from the access network equipment can increase the handover success rate, thereby improving the handover efficiency.
  • a communication method includes: determining first capability information, and selecting a target access network device based on the signal strength of at least one first candidate access network device and the first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the source access network device considers the service capability of the first candidate access network device when determining the target access network device, which can solve the problem of selecting only based on signal strength
  • the target access network device does not support the service of the terminal device, which can improve the handover success rate and reliability, save a large amount of signaling resources, and thereby improve the handover efficiency.
  • the foregoing determining the first capability information includes: sending a capability information request to the first network element or the terminal device.
  • the capability information request may include the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the method for the source access network device to obtain the first capability information includes: obtaining the first capability information from the first network element and obtaining the first capability information from the terminal device.
  • the capability information request is used to instruct the terminal device to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • a communication method includes: a first network element receives a capability information request from a source access network device, and sends the first capability information to the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the first capability information comes from the second network element. That is, the first network element can determine whether it has the first capability information, and if there is no or lack of the first capability information of some of the first candidate access network devices, it can interact with the second network element to obtain the first capability. information.
  • the communication method described in the fourth aspect may further include: the first network element receives second capability information from the second network element.
  • the second capability information is used to determine at least one second candidate access network device. That is, the first network element may also interact with the second network element to obtain second capability information, so as to provide at least one second candidate access network device for the source access network device.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • a communication method includes: a terminal device receives a capability information request from a source access network device, and sends first capability information to the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the communication method described in the fifth aspect may further include: the terminal device monitors the system message of at least one first candidate access network device and determines the first capability information. In this way, the terminal device can obtain the first capability information by monitoring system messages of several cells.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • a communication device in a sixth aspect, includes: a transceiver module and a processing module.
  • the transceiver module is used to receive the first handover request from the source access network device.
  • the first handover request includes the identification of at least one first candidate access network device and the service type information of the terminal device.
  • the processing module is used to determine the first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the processing module is further configured to determine whether at least one first candidate access network device can provide a service for the terminal device according to the first capability information.
  • the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-connected everything, and non-public network.
  • the first capability information comes from the second network element.
  • the transceiver module is also used to receive second capability information from the second network element.
  • the second capability information is used to determine at least one second candidate access network device.
  • the transceiver module is also used to send a handover response to the source access network device.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the transceiver module described in the sixth aspect may include a receiving module and a sending module.
  • the receiving module is used to receive data and/or signaling from the source access network device and/or the second network element; the sending module is used to send data and/or signaling to the source access network device and/or the second network element Signaling.
  • This application does not specifically limit the specific implementation of the transceiver module.
  • the communication device of the sixth aspect may further include a storage module, and the storage module stores a program or instruction.
  • the processing module executes the program or instruction
  • the communication device described in the sixth aspect can execute the method described in the first aspect.
  • the communication device described in the sixth aspect may be a first network element, such as an access and mobility management function (core access and mobility management function, AMF) network element, or it may be set in an access network.
  • AMF access and mobility management function
  • the chip (system) or other components or components of the device are not limited in this application.
  • a communication device in a seventh aspect, includes: a receiving module and a sending module. Wherein, the sending module is used to send the first handover request to the first network element. Wherein, the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device. The receiving module is further configured to receive a handover response from the first network element, where the handover response is used to indicate that at least one first candidate access network device cannot provide service for the terminal device.
  • the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-connected everything, and non-public network.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the communication device described in the seventh aspect may further include a processing module.
  • the processing module is configured to determine the target access network device according to the identifier of the at least one second candidate access network device.
  • the sending module is also used to send the second handover request to the first network element.
  • the second handover request includes the identifier of the target access network device.
  • the receiving module and the sending module can be set separately or integrated into one module, namely the transceiver module. This application does not specifically limit the specific implementation of the receiving module and the sending module.
  • the communication device of the seventh aspect may further include a storage module, and the storage module stores a program or instruction.
  • the processing module executes the program or instruction
  • the communication device described in the seventh aspect can execute the method described in the second aspect.
  • the communication device described in the seventh aspect may be a source access network device, or a chip (system) or other components or components that can be set in the source access network device, which is not limited in this application. .
  • a communication device includes: a processing module. Among them, the determining module and the selecting module are used to determine the first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the selection module is configured to select the target access network device according to the signal strength and first capability information of the at least one first candidate access network device.
  • the communication device described in the eighth aspect may further include a transceiver module.
  • the transceiver module is used to send a capability information request to the first network element or terminal device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the capability information request is used to instruct the terminal device to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • the transceiver module of the eighth aspect may include a receiving module and a sending module.
  • the receiving module is used to receive data and/or signaling from the first network element and/or terminal device;
  • the transmitting module is used to send data and/or signaling to the first network element and/or terminal device.
  • This application does not specifically limit the specific implementation of the transceiver module.
  • the determination module and the selection module described in the eighth aspect both perform processing functions, which can be set separately or integrated into one module, that is, the processing module. This application does not specifically limit the specific implementation of the determination module and the selection module.
  • the communication device of the eighth aspect may further include a storage module that stores programs or instructions.
  • the processing module executes the program or instruction
  • the communication device described in the eighth aspect can execute the method described in the third aspect.
  • the communication device described in the eighth aspect may be a source access network device, or a chip (system) or other components or components that can be set in the source access network device, which is not limited in this application. .
  • the technical effect of the communication device described in the eighth aspect may refer to the technical effect of the communication method described in any one of the possible implementation manners of the third aspect, which will not be repeated here.
  • a communication device in a ninth aspect, includes: a receiving module and a sending module.
  • the receiving module is used to receive the capability information request from the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the sending module is used to send the first capability information to the source access network device.
  • the first capability information comes from the second network element.
  • the receiving module is also used to receive second capability information from the second network element.
  • the second capability information is used to determine at least one second candidate access network device.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • the receiving module and the sending module can be set separately or integrated into one module, namely the transceiver module. This application does not specifically limit the specific implementation of the receiving module and the sending module.
  • the communication device of the ninth aspect may further include a processing module and a storage module, and the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the communication device described in the ninth aspect can execute the method described in the fourth aspect.
  • the communication device described in the ninth aspect may be the first network element, or may be a chip (system) or other components or components that can be installed in the first network element, which is not limited in this application.
  • a communication device in a tenth aspect, includes: a receiving module and a sending module.
  • the receiving module is used to receive the capability information request from the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the sending module is also used to send the first capability information to the source access network device.
  • the communication device described in the tenth aspect may further include a processing module.
  • the processing module is configured to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information may include the service type of the communication device, and the service type of the communication device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • the receiving module and the sending module can be set separately or integrated into one module, namely the transceiver module. This application does not specifically limit the specific implementation of the receiving module and the sending module.
  • the communication device of the tenth aspect may further include a storage module, and the storage module stores a program or instruction.
  • the processing module executes the program or instruction
  • the communication device described in the tenth aspect can execute the method described in the fifth aspect.
  • the communication device described in the tenth aspect may be a terminal device, or a chip (system) or other components or components that can be installed in the terminal device, which is not limited in this application.
  • a communication device in an eleventh aspect, includes a processor and a communication interface.
  • the processor is configured to communicate with other devices through a communication interface, and execute the communication method described in any one of the possible implementation manners of the first aspect to the fifth aspect.
  • the communication interface may be a transceiver circuit for the communication device to communicate with other communication devices.
  • the communication device described in the eleventh aspect may further include a memory.
  • the memory is used to store computer programs.
  • the transceiver can be used for the communication device to communicate with other communication devices.
  • the communication device described in the eleventh aspect may be a first network element or a source access network device or terminal device, or may be provided in a chip of the first network element or source access network device or terminal device ( System) or other components or components.
  • the twelfth aspect provides a communication system.
  • the system includes a first network element, source access network equipment, target access network equipment, and terminal equipment.
  • the first network element may be an AMF network element.
  • the system may also include a second network element, such as an AMF network element, a unified data management (UDM) network element, and an operation, administration and maintenance (OAM) network element.
  • AMF AMF network element
  • UDM unified data management
  • OAM operation, administration and maintenance
  • a computer-readable storage medium including: the computer-readable storage medium includes a computer program or instruction; when the computer program or instruction runs on a computer, the computer executes the first to fifth aspects.
  • a computer program product including a computer program or instruction.
  • the computer program or instruction runs on a computer, the computer can execute any one of the possible implementation manners of the first aspect to the fifth aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application
  • FIG. 2 is a first structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 3 is a first flowchart of a communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram 2 of the flow of the communication method provided by an embodiment of this application.
  • FIG. 5 is a third schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 6 is a fourth flowchart of a communication method provided by an embodiment of this application.
  • FIG. 7 is a second structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 8 is a third structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 9 is a fourth structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 10 is a fifth structural schematic diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a sixth structural diagram of a communication device provided by an embodiment of this application.
  • WiFi wireless fidelity
  • V2X vehicle-to-everything
  • D2D device-todevie
  • Communication systems vehicle networking communication systems
  • 4th generation (4G) mobile communication systems such as long term evolution (LTE) systems
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation mobile communication system
  • NR new radio
  • 6G sixth generation
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which the communication method provided in an embodiment of the application is applicable.
  • the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application.
  • the solutions in the embodiments of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with the names of corresponding functions in other mobile communication systems.
  • the communication system includes a first network element, a source access network device, a target access network device, and terminal devices.
  • the communication system may further include a second network element.
  • the first network element is a device that is located on the network side of the communication system and provides network services for terminal devices, or a chip (system) or other components or components that can be installed in the device.
  • the first network element may be a core network element, such as an access and mobility management function (core access and mobility management function, AMF) network element.
  • AMF access and mobility management function
  • the second network element is a device located on the network side of the communication system and can communicate with the first network element, or a chip (system) or other components or components that can be installed in the device.
  • the second network element may be a core network element, such as an AMF network element or a unified data management (UDM) network element.
  • the second network element may also be other network elements, such as operations, administration and maintenance (OAM) network elements.
  • OAM operations, administration and maintenance
  • the first network element and the second network element are both AMF network elements
  • the first network element and the second network element may be the same AMF network element, that is, the source access network device and the target access network
  • the devices are all access network devices managed by the same AMF network element, or different AMF network elements, that is, the source access network device and the target access network device are managed by different AMF network elements.
  • the aforementioned source access network equipment and target access network equipment may also be collectively referred to as access network equipment.
  • the access network device is a device that is located on the network side of the above-mentioned communication system and has a wireless transceiver function, or a chip (system) or other components or components that can be installed in the device.
  • Access network equipment includes but is not limited to: access points (AP) in wireless fidelity (WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., evolved node B ( evolved Node B (eNB), radio network controller (RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), Home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP) ), etc., can also be 5G, such as gNB in the new radio (NR) system, or transmission point (TRP or TP), one or a group of base stations in the 5G system (including multiple antenna panels)
  • the antenna panel or, can also be a network node that constitutes a gNB or transmission point, such as a baseband unit (BBU), or a
  • the above-mentioned OAM network element may also be referred to as an OAM device.
  • the foregoing AMF network elements, UDM network elements, OAM network elements, and access network devices may also be collectively referred to as network devices.
  • the embodiment of this application does not specifically limit the specific names of the foregoing first network element and second network element. .
  • the above-mentioned terminal equipment is a terminal that is connected to the above-mentioned communication system and has a wireless transceiver function, or a chip (system) or other components or components that can be installed in the terminal.
  • the terminal device may also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, vehicle-mounted terminals, RSUs with terminal functions, etc.
  • the terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit that is built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, The on-board component, on-board chip or on-board unit can implement the communication method provided in this application.
  • the communication method provided in the embodiment of the present application may be applicable to the communication between the source access network device and the first network element shown in FIG. 1.
  • the communication method can also be used for the communication between the source access network device and the terminal device shown in FIG. 1.
  • FIG. 1 is only a simplified schematic diagram of an example for ease of understanding, and the communication system may also include other network devices and/or other terminal devices, which are not shown in FIG. 1.
  • FIG. 2 is a first structural diagram of a communication device that can be used to implement the communication method provided by an embodiment of the present application.
  • the communication device may be the first network element, or a chip (system) or other components or components applicable to the first network element.
  • the communication device may be a source access network device, or a chip (system) or other components or components applicable to the source access network device.
  • the communication device may also be a terminal device, or a chip (system) or other components or components applicable to the terminal device.
  • the communication device 200 includes a processor 201 and a communication interface 202.
  • the processor 201 may be integrated with the communication interface 202, or may exist independently.
  • the communication device 200 may further include a memory 203, and the memory 203 may be integrated with the processor 201 or may exist independently, which is not specifically limited in the embodiment of the present application.
  • each component of the communication device 200 will be specifically introduced with reference to FIG. 2:
  • the processor 201 is the control center of the communication device 200, and may be a processor or a collective name for multiple processing elements.
  • the processor 201 is one or more central processing units (CPU), or an application specific integrated circuit (ASIC), or is configured to implement one or more of the embodiments of the present application.
  • An integrated circuit for example: one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA).
  • the processor 201 can execute various functions of the communication device 200 by running or executing a software program stored in the memory 203 and calling data stored in the memory 203.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 2.
  • the communication device 200 may also include multiple processors, such as the processor 201 and the processor 204 shown in FIG. 2. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
  • the processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the memory 203 can be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or other types that can store information and instructions.
  • the type of dynamic storage communication equipment can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital universal disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired program codes in the form of instructions or data structures. Any other medium that can be accessed by the computer, but not limited to this.
  • the memory 203 is used to store a software program for executing the solution of the present application, and the processor 201 controls the execution.
  • the processor 201 controls the execution.
  • the communication interface 202 may be a transceiver circuit for communication with other communication devices.
  • the communication apparatus 200 is a first network element, and the communication interface 202 may be used to communicate with a source access network device or communicate with a second network element.
  • the communication apparatus 200 is a source access network device, and the communication interface 202 may be used to communicate with a terminal device or communicate with a first network element.
  • the communication apparatus 200 is a terminal device, and the communication interface 202 may be used to communicate with a source access network device.
  • the transceiver circuit may be a device such as a transceiver or a transceiver.
  • the communication interface 202 may also be an input/output (I/O) circuit of the processor 201 to implement signal input and signal output of the processor 201.
  • I/O input/output
  • the structure of the communication device 200 shown in FIG. 2 does not constitute a limitation on the communication device.
  • the actual communication device may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.
  • FIG. 3 is a first schematic flowchart of a communication method provided by an embodiment of this application. This communication method can be applied to the communication between the first network element and the source access network device shown in FIG. 1.
  • the communication method includes the following steps:
  • the source access network device sends a first handover request to the first network element.
  • the first network element receives the first handover request from the source access network device.
  • the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device.
  • the terminal device may send a measurement report to the source access network device.
  • the source access network device can receive the measurement report from the terminal device.
  • the measurement report may include measurement results of at least one access network device, such as signal strength, channel status, and so on.
  • the source access network device may select at least one first candidate access network device from at least one access network device according to the signal strength as the candidate target access network device of the terminal device. That is, the source access network device can select the access network device whose signal strength meets the requirements of the terminal device as the candidate target access network device.
  • the service type of terminal equipment may include one or more of the following: reduced capability (REDCAP), multicast broadcast service (MBS), vehicle-to-everything (V2X) ), non-public network (NPN). It should be noted that the terminal device may also include other types of services, which are not limited in this application.
  • REDCAP reduced capability
  • MMS multicast broadcast service
  • V2X vehicle-to-everything
  • NPN non-public network
  • the first network element determines first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the first capability information may include: the identification of at least one first candidate access network device and whether it supports the service type of the terminal device.
  • the first capability information may also include: specific capabilities of the access network device.
  • the first capability information may include: access network device 1, supporting REDCAP, and the maximum access bandwidth value of the supported REDCAP terminal device.
  • the first capability information may include: the access network device 1, which supports MBS, and which MBS services are specifically supported.
  • the first capability information may include: access network device 1, supporting V2X, and whether the scheduling mode of the PC5 port is mode 2 (mode 2) or mode 3 (mode 3).
  • the first capability information may include: access network device 1, supporting NPN, and supporting closed access group ID (CAG ID).
  • CAG ID closed access group ID
  • the first capability information may include: access network device 2 does not support REDCAP, does not support MBS, does not support V2X, and does not support NPN.
  • the first capability information may also include other types of capability information of at least one first candidate access network device, such as current load conditions, congestion control strategies, security control strategies, and subscription conditions (such as the use of access network devices). Rights), other management and control strategies, etc.
  • the first network element determining the first capability information may include: the first network element determines the first capability information according to known information, and/or the first network element obtains the first capability information from the second network element.
  • the second network element may be an AMF network element, a UDM network element, or an OAM network element.
  • the embodiment of the present application does not specifically limit the source of the first capability information.
  • the specific principle for the first network element to determine the first capability information using the above-mentioned method is as follows.
  • the first network element may determine the first capability information only based on the known information.
  • the first network element can only determine the first capability information of part of the first candidate access network device or the first capability information of the first candidate access network device based on the known information, the first network element A part of the first capability information may be determined based on the known information, and another part of the first capability information may be obtained from the second network element.
  • the first network element may also omit the step of determining the first capability information based on known information, and directly obtain all the first capability information from the second network element.
  • the foregoing first network element obtains the first capability information from the second network element, which may specifically include the following S303 to S304.
  • the first network element sends a first capability request to the second network element.
  • the second network element receives the first capability request from the first network element.
  • the first capability request may include: an identifier of at least one first candidate access network device.
  • the first capability request includes the identification of the access network device 1 and the identification of the access network device 2, so that the first network element can request the second network element for the access network device 1, the access network device mastered by the second network element. All service capabilities of networked device 2.
  • the first capability request may include: the identification of the at least one first candidate access network device and the service type information of the terminal device.
  • the first capability request includes the identifier of the access network device 1, the identifier of the access network device 2, and the MBS, and the first network element requests the second network element for the MBS service capability of the access network device 1 for the terminal device. , The service capability of the access network device 2 to the MBS of the terminal device.
  • the second network element sends a first capability response to the first network element.
  • the first network element receives the first capability response from the second network element.
  • the first capability response includes first capability information.
  • the first capability request includes: the identity of access network device 1, the identity of access network device 2, and MBS
  • the first capability information may have the following Several ways to achieve it.
  • the first capability information may include: access network device 1.
  • the first capability information may include: the access network device 1 supports MBS. That is, the second network element may only return the capability information of the access network device that supports the service type requested in the first capability request.
  • the first capability information may include: access network device 1, which supports MBS; and access network device 2, which does not support MBS. That is to say, which access network equipment and which service types of terminal equipment are requested by the first network element, and which capability information is returned by the second network element.
  • the first capability information may also include capability information not requested by the first network element.
  • the first capability information may include: access network device 1, which supports MBS; access network device 2, which does not support MBS; access network device 3, which supports MBS; and access network device 4, which does not support MBS. That is, the second network element can return the MBS service capability of the access network device to the terminal device that is not requested by the first network element.
  • the first capability information may further include: access network device 1, which supports MBS, but does not support NPN; and access network device 2, which does not support MBS, but supports NPN. That is to say, in addition to the information about whether the first candidate access network device supports MBS, the second network element can also return other service capabilities of the first candidate access network device, and can also return the current load situation, congestion control strategy, etc. Other types of capability information.
  • the first capability information may further include: access network device 1, which supports MBS, but does not support NPN; access network device 2, which does not support MBS, but supports NPN; and access network device 3, which supports MBS, but supports NPN; Access network equipment 4 does not support MBS but supports NPN. That is, in addition to the MBS service capability of the first candidate access network device to the terminal device requested by the first network element, the second network element may also return other service capabilities of the first candidate access network device, and/or, The service capability of the access network device not requested by the first network element may also return other types of capability information such as the current load situation and congestion control strategy.
  • the first network element can determine whether at least one first candidate access network device can provide a service for the terminal device.
  • the first network element determines whether at least one first candidate access network device can provide a service for the terminal device according to the first capability information.
  • the first network element determines that at least one first candidate access network device can provide services for the terminal device according to the first capability information.
  • the element sends an N2 handover message (N2 handover) to complete the handover of the terminal device from the source access network device to the target access network device.
  • N2 handover N2 handover message
  • the first capability information includes: access network equipment 1, which supports MBS; access network equipment 2, which supports MBS, then access network equipment 1, access network equipment 2 If both can provide the MBS service for the terminal device, the first network element can perform the following S308.
  • the first capability information includes: access network equipment 1, which supports MBS; access network equipment 2, which does not support MBS, then access network equipment 1 can provide terminal equipment service. That is, as long as any one of the plurality of first candidate access network devices can provide a service for the terminal device, the first network element can perform the following S308.
  • the service type requested by the terminal device is MBS and V2X
  • the priority of MBS is higher than the priority of V2X
  • the first capability information includes: access network device 1, which supports MBS but does not support V2X; Device 2, does not support MBS, does not support V2X, you can determine whether the access network device can provide services for the terminal device according to the priority of the service type, which is not limited in this application.
  • the first network element may determine the second capability information , And determine at least one second candidate access network device according to the second capability information.
  • at least one second candidate access network device is an access network device that can provide services for terminal devices.
  • the second capability information may be used to determine at least one second candidate access network device.
  • the second capability information may include capability information of an access network device that can provide services for the terminal device, which is determined according to the service type of the terminal device.
  • the second capability information includes at least one capability information of an access network device that can provide services for the terminal device, so that the first network element can determine the second candidate access network device.
  • the specific content of the second capability information reference may be made to the specific content of the first capability information in S302, which will not be repeated here.
  • the first capability information includes: access network device 1, which does not support MBS; access network device 2, which does not support MBS, that is, access network device 1, access network If neither device 2 can provide a service for the terminal device, the first network element may determine the second capability information, and determine at least one second candidate access network device according to the second capability information.
  • the first network element may also determine a suggested target-RAN-list for the source access network device. ), that is, at least one second candidate access network device, the source access network device can select the target access network device based on the at least one second candidate access network device, and initiate a handover request again, thereby improving the handover success rate and reliability .
  • At least one first candidate access network device is a candidate access network device determined by the source access network device, and the first network element determines whether it can be used as a target access network device, and at least one second candidate access network device
  • the network access device is an access network device that is determined by the first network element and can provide services for the terminal device, and the source access network device determines the target access network device from it.
  • the at least one second candidate access network device does not include at least one first network element.
  • a candidate access network device that is, when the first network element determines the second candidate access network device list, it excludes at least one first candidate access network device that has been determined to be unable to provide services for the terminal device, and narrows the selection range of the second candidate access network device. , Thereby improving switching efficiency.
  • determining the second capability information by the first network element may include: the first network element determines the second capability information according to known information, and/or the second capability information may also come from the second network element.
  • the first network element can determine the second capability information only based on known information, the first network element can also obtain the second capability information from the second network element, and the first network element can also be combined with the first network element.
  • the known information and the information fed back by the second network element determine the second capability information.
  • the embodiment of the present application does not specifically limit the source of the second capability information.
  • the first network element obtains the second capability information from the second network element, which may specifically include the following steps 1 to 2:
  • Step 1 The first network element sends a second capability request to the second network element.
  • the second network element receives the second capability request from the first network element.
  • the second capability request may include: service type information of the terminal device, that is, the first network element may request a second candidate access network device that can provide services for the terminal device from the second network element.
  • the second capability request includes MBS.
  • the second capability request includes MBS and NPN.
  • Step 2 The second network element sends a second capability response to the first network element.
  • the first network element receives the second capability response from the second network element.
  • the second capability response includes second capability information.
  • the second capability request includes MBS, V2X, NPN, and second capability information
  • the second capability information may include: access network device 5, supporting MBS, supporting V2X, and supporting NPN; and access network device 6, supporting MBS, supporting V2X, and supporting NPN.
  • the second network element may only return the capability information of the access network devices that support all service types requested in the second capability request, that is, the second network element only returns the access network devices that support MBS, V2X, and NPN at the same time 5.
  • the second capability information may include: access network equipment 5, supporting MBS, supporting V2X, and supporting NPN; access network equipment 6, supporting MBS, supporting V2X, and supporting NPN; access network equipment 7, not supporting MBS , Support V2X, support NPN. That is, when the second capability request includes multiple service types, the second network element may also return the capability information of the access network device that supports part of the service types included in the second capability request, that is, the second network element may return The capability information of the access network device 5 and the access network device 6 that support MBS, V2X, and NPN at the same time, and the capability information of the access network device 7 that does not support MBS but supports V2X and NPN can also be returned.
  • the second capability information may include: access network equipment 5, support MBS, support V2X, support NPN, but not REDCAP; access network equipment 6, support MBS, support V2X, support NPN, support REDCAP; access; Network equipment 7, does not support MBS, supports V2X, supports NPN, and supports REDCAP. That is to say, the second network element can also return other service capabilities of the access network device that supports part or all of the service type information included in the second capability request, such as whether to support REDCAP, and can also return the current load status, congestion control strategy, etc. Other types of capability information.
  • this application does not limit the implementation manner of the second capability information, and it is subject to the ability to determine at least one second candidate access network device.
  • the first network element may also obtain the second capability information during the interaction between the first network element and the second network element in S303 to S304, and this application does not limit when to obtain the second capability information.
  • the following specifically describes the determination of at least one second candidate access network device by the first network element according to the second capability information.
  • the second capability information includes: access network device 5, which supports MBS; access network device 6, which supports MBS; and access network device 7, which does not support MBS, at least A second candidate access network device includes an access network device 5 and an access network device 6.
  • the access network device that supports all the services requested by the terminal device at the same time can be selected first as the second candidate access network device, and the number of service types requested by the terminal device can also be selected.
  • the most access network device is used as the second candidate access network device, and the second candidate access network device may also be selected according to the priority of the service type.
  • the second candidate access network device may be selected based on the following rules:
  • the second candidate access network device can also be selected according to the priority of the service type.
  • the access network device that supports MBS and V2X can be selected first as the second candidate access network device, and the access network that supports MBS and NPN can also be selected.
  • the device serves as the second candidate access network device, and an access network device that supports MBS can also be selected as the second candidate access network device.
  • the first network element may determine at least one second candidate access network device according to the actual needs of the terminal device, which is not limited in this application.
  • the first network element sends a handover response to the source access network device.
  • the source access network device receives the handover response from the first network element.
  • the handover response is used to indicate that at least one first candidate access network device cannot provide service for the terminal device.
  • the service type requested by the terminal device is MBS
  • the first capability information includes: the access network device 1 does not support MBS
  • the handover response indicates that the access network device 1 cannot provide services for the terminal device.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the handover response may also include a list of target access network devices, that is, the identification of at least one second candidate access network device, for use by the source access network device when selecting the target access network device again. The device may select the target access network device based on the at least one second candidate access network device, and initiate the second handover request.
  • the source access network device may also send a second handover request to the first network element.
  • the first network element may also receive the second handover request from the source access network device.
  • the second handover request includes the identification of the target access network device, and the identification of the target access network device may be determined from at least one second candidate access network device.
  • the source access network device may determine the target access network device from the at least one second candidate access network device according to the signal strength. That is to say, when the source access network device re-determines the target access network device, it can select the access network device with the strongest signal strength from the access network devices suggested by the first network element that can provide services for the terminal device.
  • the target access network equipment eliminates the access network equipment that cannot provide services for the terminal equipment, which can improve the selection efficiency of the target access network equipment.
  • the source access network device can also select the target access network device from at least one second candidate access network device according to other types of capability information of the access network device.
  • select the access network device with the lightest current load as the target access network device and select the access network device with the fastest transmission rate as the target access network device according to the access bandwidth of the access network device.
  • the specific implementation method can be set according to actual needs. This is not limited.
  • N2 handover message N2 handover
  • the first network element after the first network element receives the second handover request from the source access network device, it can also determine whether the target access network device included in the second handover request can provide services to the terminal device, or it can no longer be performed. Judging, this application does not limit this.
  • the first network element After the first network element determines that the selected target access network device can provide services for the terminal device, the first network element sends an N2 handover message to the second network element.
  • the specific implementation method can refer to the prior art, and this application will not Go into details.
  • the source access network device sends a first handover request to the first network element, where the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device, Then the first network element determines the first capability information used to indicate the service capability of the at least one first candidate access network device, and the first network element determines the capability of the at least one first candidate access network device according to the first capability information. Whether to provide service for the terminal device, if the terminal device cannot be provided with the service, the first network element sends a handover response indicating that the terminal device cannot be provided with the service to the source access network device.
  • the first network element judges whether the first candidate access network device can be the target access network device, which can reduce the complicated signaling interaction between the first network element and the first candidate access network device, and save a lot of money. Signaling resources, and the first network element considers the capability information of the first candidate access network device in the judgment process, which can improve the handover success rate and reliability, thereby improving the handover efficiency.
  • the capability judgment of the access network device is performed by the first network element. In the embodiment of the present application, the judgment may also be performed by the source access network device. For details, refer to the communication method shown in Figure 4 to Figure 6 below.
  • FIG. 4 is a second schematic diagram of the flow of the communication method provided by an embodiment of the application. This communication method can be applied to the communication system shown in FIG. 1 to perform the function of the source access network device. As shown in Figure 4, the communication method includes the following steps:
  • S401 The source access network device determines first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the specific content of the first capability information refer to the above S302, which will not be repeated here.
  • the source access network device determining the first capability information may include the following S501-S505, the source access network device obtaining the first capability information from the first network element, or the following S601-S603 source access The network device obtains the first capability information from the terminal device.
  • the terminal device may send a measurement report to the source access network device.
  • the source access network device can receive the measurement report from the terminal device.
  • the measurement report may include measurement results of at least one access network device, such as signal strength, channel status, and so on.
  • the source access network device selects a target access network device according to the signal strength of the at least one first candidate access network device and the first capability information.
  • the source access network device may select an access network device that can provide a service for the terminal device according to the signal strength of the at least one first candidate access network device and the first capability information.
  • the source access network device can select from at least one first candidate access network device according to the signal strength the access network device whose signal strength meets the terminal device demand, and according to the first capability information from the signal strength to meet the terminal device demand
  • the access network equipment that can provide services for the service type of the terminal equipment is determined from the access network equipment as the target access network equipment.
  • the source access network device can also select the target access network device from the access network devices that can provide services for the service type of the terminal device according to other types of capability information of the access network device. For example, you can According to the current load situation of each access network device, the access network device with the lightest current load is selected as the target access network device, and the access network device with the fastest transmission rate can be selected as the target according to the access bandwidth of the access network device
  • the access network equipment can also comprehensively consider the current load situation of the access network equipment, congestion control strategy, security control strategy, contract status, other management and control strategies, signal strength and other information to determine the target access network equipment.
  • the specific implementation method can be It is set according to actual needs, and this application does not limit it.
  • the access network device that supports all the services requested by the terminal device can be selected first as the target access network device, or the one with the largest number of service types requested by the terminal device can be selected.
  • the target access network device can also be selected according to the priority of the service type. For a specific example, refer to the example of selecting the second candidate access network device in S305, which will not be repeated here.
  • the source access network device sends a handover request to the first network element.
  • the first network element receives the handover request sent by the source access network device.
  • the handover request includes the identification of the target access network device.
  • the source access network device determines the target access network device for the terminal device, it can send a handover request to the first network element.
  • the first network element can directly execute the above S308, and the first network element sends an N2 handover message to the second network element.
  • the first network element may also first determine whether the selected target access network device is reasonable, and if it is reasonable, execute the foregoing S308. If it is unreasonable, the first network element may execute the above S306, and the first network element sends a handover response to the source access network device, instructing the source access network device to reselect the target access network device.
  • the source access network device considers the service capability of the first candidate access network device when determining the target access network device, which can solve the problem that the target access network device selected based on signal strength does not support
  • the service problem of the terminal equipment can improve the handover success rate and reliability, save a large amount of signaling resources, and thereby improve the handover efficiency.
  • the source access network device determining the first capability information may include: the source access network device obtains the first capability information from the first network element. For details, refer to FIG. 5 below. Out of the communication method.
  • the source access network device determining the first capability information may include: the source access network device obtains the first capability information from the terminal device.
  • the source access network device obtains the first capability information from the terminal device.
  • FIG. 5 is a third schematic flowchart of a communication method provided by an embodiment of this application. This communication method may be applicable to the communication between the source access network device and the first network element shown in FIG. 1. As shown in Figure 5, the communication method includes the following steps:
  • the source access network device sends a capability information request to the first network element.
  • the first network element receives the capability information request from the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the service type information includes the service type of the terminal device.
  • the specific content included in the service type of the terminal device refer to the foregoing S302, which will not be repeated here.
  • the capability information request may include the identification of the access network device 1 and the identification of the access network device 2, and the source access network device may request all of the access network device 1 and the access network device 2 from the first network element. Service capabilities.
  • the capability information request may include MBS, and the source access network device may request the first network element for the MBS service capability of one or more access network devices for the terminal device.
  • the capability information request may include the identifier of the access network device 1, the identifier of the access network device 2, and the MBS.
  • the source access network device may request the first network element for the MBS of the access network device 1 for the terminal device.
  • Service capability the service capability of the access network device 2 to the MBS of the terminal device.
  • the first network element determines first capability information.
  • the first network element determining the first capability information may include: the first network element determines the first capability information according to known information, and/or the first network element obtains the first capability information from the second network element.
  • Ability information may include: the first network element determines the first capability information according to known information, and/or the first network element obtains the first capability information from the second network element.
  • the foregoing first network element obtains the first capability information from the second network element, which may specifically include the following S503 to S504.
  • S503 The first network element sends a third capability request to the second network element.
  • the second network element receives the third capability request from the first network element.
  • the third capability request may include the identification of at least one first candidate access network device.
  • the identification of at least one first candidate access network device may include the identification of at least one first candidate access network device.
  • the third capability request may include the identification and service type information of at least one first candidate access network device.
  • the identification and service type information may include the identification and service type information of at least one first candidate access network device.
  • the third capability request may include service type information.
  • the first network element may request the MBS service capability of one or more access network devices to the terminal device from the second network element, including access network devices that support MBS and access network devices that do not support MBS. .
  • the second network element sends a third capability response to the first network element.
  • the first network element receives the third capability response from the second network element.
  • the third capability response includes first capability information.
  • the third capability request includes: the identity of the access network device 1, the identity of the access network device 2, and the MBS, the first capability
  • the third capability request includes: the identity of the access network device 1, the identity of the access network device 2, and the MBS, the first capability
  • the first capability information may include: access network device 1, which supports MBS; access Network equipment 2, does not support MBS.
  • the first network element may determine the second capability information, and the second capability information includes at least one capability information of an access network device that can provide a service for the terminal device.
  • the second capability information includes at least one capability information of an access network device that can provide a service for the terminal device.
  • the specific content of the second capability information reference may be made to the specific content of the first capability information in S302, which will not be repeated here.
  • the second capability information is used to determine at least one second candidate access network device, and at least one second candidate access network device is an access network device that can provide services for the terminal device, so that the source access network device
  • the target access network device can be selected from at least one second candidate access network device to avoid selecting the target access network device from the access network devices that cannot provide services for the terminal device, thereby improving the handover success rate and reliability.
  • this application does not limit the implementation manner of the second capability information, and it is subject to the ability to determine at least one second candidate access network device.
  • the first network element sends the first capability information to the source access network device.
  • the source access network device receives the first capability information from the first network element.
  • the first network element may also send the second capability information to the source access network device.
  • the source access network device receives the second capability information from the first network element. That is to say, the first network element can only send the capability information of the access network equipment that supports the service type information to the source access network equipment, exclude the access network equipment that cannot provide services for the terminal equipment, and reduce the target access network equipment. The range of choice to improve switching efficiency.
  • the source access network device selects the target access network device according to the signal strength of the at least one first candidate access network device and the first capability information.
  • the source access network device selects the target access network device according to the signal strength of at least one first candidate access network device and the first capability information for a specific implementation manner of S402, which will not be repeated here.
  • the source access network device may determine the target access network device according to the signal strength and second capability information of the at least one first candidate access network device.
  • the specific implementation manner is the same as that of the source access network device according to the at least one first candidate
  • the signal strength of the access network device is similar to the specific implementation manner of selecting the target access network device by the first capability information, and details are not described herein again.
  • the source access network device obtains first capability information including the service capability of at least one first candidate access network device from the first network element, and according to the at least one first candidate access network device Selecting the target access network device based on the signal strength and first capability information can solve the problem that the target access network device selected only based on the signal strength does not support the service of the terminal device, and can improve the accuracy of the target access network device selection, thereby Improve switching efficiency.
  • FIG. 6 is a fourth flowchart of a communication method provided by an embodiment of this application. This communication method can be applied to the communication between the source access network device and the terminal device shown in FIG. 1. As shown in Figure 6, the communication method includes the following steps:
  • the source access network device sends a capability information request to the terminal device.
  • the terminal device receives the capability information request from the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the capability information request refer to the foregoing S501, which will not be repeated here.
  • the capability information request is used to instruct the terminal device to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information includes the service type of the terminal device.
  • the specific content included in the service type of the terminal device refer to the foregoing S302, which will not be repeated here.
  • the terminal device monitors the system message of at least one first candidate access network device and determines first capability information.
  • the terminal device determines the first capability information according to the capability information request, that is, the terminal device monitors the system message of at least one first candidate access network device according to the instruction of the source access network device, from the monitored system message
  • the first capability information requested by the source access network device is determined in.
  • the terminal device may also monitor system messages of at least one access network device other than the first candidate access network device that the source access network device instructs it to monitor, and determine other access network devices from the monitored system messages.
  • the capability information of the device may be used to determine other access network devices from the monitored system messages.
  • the terminal device sends the first capability information to the source access network device.
  • the source access network device receives the first capability information from the terminal device.
  • the first capability information may also include capability information not requested by the source access network device.
  • capability information not requested by the source access network device.
  • the terminal device can filter out the capability information of the access network device that supports the service type information of the terminal device from the monitored system message, and return it to the source access network device.
  • the source access network device selects a target access network device according to the signal strength of the at least one first candidate access network device and the first capability information.
  • the source access network device selects the target access network device according to the signal strength of at least one first candidate access network device and the first capability information for a specific implementation manner of S402, which is not repeated here.
  • the source access network device obtains first capability information including the service capability of at least one first candidate access network device from the terminal device, and according to the signal of the at least one first candidate access network device Strength and first capability information to select the target access network device can solve the problem that the target access network device selected only based on the signal strength does not support the service of the terminal device, and can improve the accuracy of the target access network device selection, thereby improving handover efficient.
  • the communication method provided by the embodiment of the present application is described in detail above with reference to FIGS. 3 to 6.
  • the communication device provided by the embodiment of the present application will be described in detail below with reference to FIGS. 7-11.
  • FIG. 7 is a second structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device can be applied to the communication system shown in FIG. 1 to perform the function of the first network element in the communication method shown in FIG. 3.
  • FIG. 7 only shows the main components of the communication device.
  • the communication device 700 includes: a transceiver module 701 and a processing module 702.
  • the transceiver module 701 is configured to receive the first handover request from the source access network device.
  • the first handover request includes the identification of at least one first candidate access network device and service type information of the terminal device.
  • the processing module 702 is used to determine the first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the processing module 702 is further configured to determine whether at least one first candidate access network device can provide a service for the terminal device according to the first capability information.
  • the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-connected everything, and non-public network.
  • the first capability information comes from the second network element.
  • the transceiver module 701 is also configured to receive second capability information from the second network element. Wherein, the second capability information is used to determine at least one second candidate access network device.
  • the transceiver module 701 is also used to send a handover response to the source access network device.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the transceiver module 701 may include a receiving module and a sending module (not shown in FIG. 7).
  • the receiving module is used to receive data and/or signaling from the source access network device and/or the second network element; the sending module is used to send data and/or signaling to the source access network device and/or the second network element Signaling.
  • This application does not specifically limit the specific implementation of the transceiver module 701.
  • the communication device 700 may further include a storage module (not shown in FIG. 7), and the storage module stores programs or instructions.
  • the processing module 702 executes the program or instruction
  • the communication device 700 can execute the function of the first network element in the communication method shown in FIG. 3.
  • the communication device 700 may be the first network element shown in FIG. 1 or the communication device 200 shown in FIG. 2, such as an access and mobility management function (core access and mobility management function, AMF) network element, It may also be a chip (system) or other components or components that can be installed in the access network device, which is not limited in this application.
  • AMF access and mobility management function
  • AMF core access and mobility management function
  • the technical effects of the communication device 700 shown in FIG. 7 may refer to the technical effects of the communication method shown in FIG. 3, which will not be repeated here.
  • FIG. 8 is a third structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device can be applied to the communication system shown in FIG. 1 to perform the function of the source access network device in the communication method shown in FIG. 3.
  • FIG. 8 only shows the main components of the communication device.
  • the communication device 800 includes: a receiving module 801 and a sending module 802.
  • the sending module 802 is configured to send the first handover request to the first network element.
  • the first handover request includes the identification of at least one first candidate access network device and the service type information of the terminal device.
  • the receiving module 801 is further configured to receive a handover response from the first network element, where the handover response is used to indicate that at least one first candidate access network device cannot provide a service for the terminal device.
  • the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-connected everything, and non-public network.
  • the handover response may include the identification of at least one second candidate access network device, and the at least one second candidate access network device is determined according to the service type of the terminal device.
  • the communication device 800 may further include: a processing module 803.
  • the processing module 803 is configured to determine the target access network device according to the identifier of the at least one second candidate access network device.
  • the sending module 802 is further configured to send a second handover request to the first network element.
  • the second handover request includes the identifier of the target access network device.
  • receiving module 801 and the sending module 802 can be provided separately or integrated into one module, namely the transceiver module (not shown in FIG. 8). This application does not specifically limit the specific implementation of the receiving module 801 and the sending module 802.
  • the communication device 800 may further include a storage module (not shown in FIG. 8), and the storage module stores programs or instructions.
  • the processing module 803 executes the program or instruction
  • the communication apparatus 800 can execute the function of the source access network device in the communication method shown in FIG. 3.
  • the communication device 800 may be the source access network device shown in FIG. 1 or the communication device 200 shown in FIG. Components, this application does not limit this.
  • the technical effect of the communication device 800 shown in FIG. 8 may refer to the technical effect of the communication method shown in FIG. 3, which will not be repeated here.
  • Fig. 9 is a fourth structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device can be applied to the communication system shown in FIG. 1 to perform the function of the source access network device in the communication method shown in FIG. 4.
  • FIG. 9 only shows the main components of the communication device.
  • the communication device 900 includes: a determination module 901 and a selection module 902.
  • the determining module 901 is used to determine the first capability information.
  • the first capability information is used to indicate the service capability of at least one first candidate access network device.
  • the selection module 902 is further configured to select a target access network device according to the signal strength and first capability information of the at least one first candidate access network device.
  • the communication device 900 may further include: a transceiver module 903.
  • the transceiver module 903 is configured to send a capability information request to the first network element or terminal device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the capability information request is used to instruct the terminal device to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • the transceiver module 903 may include a receiving module and a sending module (not shown in FIG. 9).
  • the receiving module is used to receive data and/or signaling from the first network element and/or terminal device; the transmitting module is used to send data and/or signaling to the first network element and/or terminal device.
  • This application does not specifically limit the specific implementation of the transceiver module 903.
  • both the determination module 901 and the selection module 902 perform processing functions, which can be set separately or integrated into one module, that is, a processing module (not shown in FIG. 9). This application does not specifically limit the specific implementation of the determination module 901 and the selection module 902.
  • the communication device 900 may further include a storage module (not shown in FIG. 9), and the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the communication apparatus 900 can perform the functions of the source access network device in the communication methods shown in FIG. 4, FIG. 5, and FIG. 6.
  • the communication device 900 may be the source access network device shown in FIG. 1 or the communication device 200 shown in FIG. Components, this application does not limit this.
  • the technical effects of the communication device 900 shown in FIG. 9 may refer to the technical effects of the communication methods shown in FIG. 4, FIG. 5, and FIG. 6, which will not be repeated here.
  • FIG. 10 is a fifth structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device can be applied to the communication system shown in FIG. 1 to perform the function of the first network element in the communication method shown in FIG. 5.
  • FIG. 10 only shows the main components of the communication device.
  • the communication device 1000 includes: a receiving module 1001 and a sending module 1002.
  • the receiving module 1001 is configured to receive a capability information request from a source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the sending module 1002 is configured to send the first capability information to the source access network device.
  • the first capability information comes from the second network element.
  • the receiving module 1001 is also used to receive the second capability information from the second network element.
  • the second capability information is used to determine at least one second candidate access network device.
  • the service type information may include the service type of the terminal device, and the service type of the terminal device may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • the receiving module 1001 and the sending module 1002 can be provided separately or integrated into one module, namely the transceiver module (not shown in FIG. 10). This application does not specifically limit the specific implementation of the receiving module 1001 and the sending module 1002.
  • the communication device 1000 may further include a processing module 1003 and a storage module (not shown in FIG. 10), and the storage module stores programs or instructions.
  • the processing module 1003 executes the program or instruction
  • the communication device 1000 can execute the function of the first network element in the communication method shown in FIG. 5.
  • the communication device 1000 may be the first network element shown in FIG. 1 or the communication device 200 shown in FIG. This application does not limit this.
  • the technical effect of the communication device 1000 shown in FIG. 10 may refer to the technical effect of the communication method shown in FIG. 5, which will not be repeated here.
  • FIG. 11 is a sixth structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device can be applied to the communication system shown in FIG. 1 to perform the functions of the terminal device in the communication method shown in FIG. 6.
  • FIG. 11 only shows the main components of the communication device.
  • the communication device 1100 includes: a receiving module 1101 and a sending module 1102.
  • the receiving module 1101 is configured to receive a capability information request from the source access network device.
  • the capability information request includes the identification and/or service type information of at least one first candidate access network device, the capability information request is used to request the first capability information, and the service type information is used to indicate the scope of the first capability information.
  • the sending module 1102 is also used to send the first capability information to the source access network device.
  • the communication device 1100 may further include: a processing module 1103.
  • the processing module 1103 is configured to monitor system messages of at least one first candidate access network device and determine the first capability information.
  • the service type information may include the service type of the communication device 1100, and the service type of the communication device 1100 may include one or more of the following: capacity reduction, multicast broadcast service, vehicle-linked everything, and non-public network.
  • receiving module 1101 and the sending module 1102 can be provided separately or integrated into one module, namely the transceiver module (not shown in FIG. 11). This application does not specifically limit the specific implementation of the receiving module 1101 and the sending module 1102.
  • the communication device 1100 may further include a storage module (not shown in FIG. 11, the storage module stores a program or instruction.
  • the processing module 1103 executes the program or instruction
  • the communication device 1100 can execute the program or instruction shown in FIG. 6 The function of the terminal device in the communication method.
  • the communication device 1100 may be the terminal device shown in FIG. 1 or the communication device 200 shown in FIG. Not limited.
  • the technical effect of the communication device 1100 shown in FIG. 11 may refer to the technical effect of the communication method shown in FIG. 6, which will not be repeated here.
  • the embodiment of the present application provides a communication system.
  • the system includes a first network element, source access network equipment, target access network equipment, and terminal equipment.
  • the first network element may be an AMF network element.
  • the system may also include a second network element, such as an AMF network element, a UDM network element, and an OAM network element.
  • the embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium includes a computer program or instruction; when the computer program or instruction runs on a computer, the computer is caused to execute the method described in the foregoing method embodiment Communication method.
  • the embodiment of the present application provides a computer program product, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer is caused to execute the communication method described in the foregoing method embodiment.
  • the processor in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically accessible Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
  • the foregoing embodiments may be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination.
  • the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions or computer programs.
  • the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method can be implemented in other ways.
  • the above-described device embodiments are only illustrative.
  • the division of the above-mentioned units or modules is only a logical function division.
  • there may be other division methods for example, multiple units or modules may be combined.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units/modules, and may be in electrical, mechanical or other forms.
  • the units/modules described as separate parts may or may not be physically separated, and the parts displayed as units/modules may or may not be physical units/modules, that is, they may be located in one place, or they may be distributed to Multiple network units/modules. Some or all of the units/modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each functional unit/module in each embodiment of the present application can be integrated into one processing unit/module, or each unit/module can exist alone physically, or two or more units/modules can be integrated into one. Unit/module.
  • the function is implemented in the form of a software function unit/module and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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Abstract

L'invention concerne un procédé de communication et un dispositif de communication permettant de résoudre le problème selon lequel un appareil de réseau d'accès cible inapproprié est sélectionné dans un processus de transfert intercellulaire réalisé au moyen d'une interface entre un appareil de réseau d'accès et un réseau central, et d'augmenter l'utilisation des ressources de réseau et l'efficacité de transfert intercellulaire. Le procédé comprend les étapes suivantes : un premier élément de réseau reçoit une première demande de transfert intercellulaire en provenance d'un appareil de réseau d'accès source ; le premier élément de réseau détermine des premières informations de capacité ; le premier élément de réseau détermine, en fonction des premières informations de capacité, si au moins un premier appareil de réseau d'accès candidat est apte à fournir un service à un appareil terminal ; et si tel n'est pas le cas, une réponse de transfert intercellulaire transmise à l'appareil de réseau d'accès source par le premier élément de réseau comprend un identifiant d'au moins un second appareil de réseau d'accès candidat apte à fournir un service à l'appareil terminal, la première demande de transfert intercellulaire comprenant un identifiant du ou des premiers appareils de réseau d'accès candidats et des informations de type de service de l'appareil terminal, et la réponse de transfert intercellulaire indiquant si le ou les premiers appareils de réseau d'accès candidat sont aptes à fournir un service à l'appareil terminal.
PCT/CN2021/082694 2020-03-31 2021-03-24 Procédé de communication et dispositif de communication WO2021197160A1 (fr)

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